A plate heat exchanger with detachable single plate

Abstract

The present invention discloses a single-plate detachable plate heat exchanger, comprising a frame, a water header and a heat exchange plate are arranged on the frame, the heat exchange plate is composed of a plurality of plates fixedly mounted on the frame, the water inlet of the plate is connected to the water inlet header through a bend pipe, the water outlet of the plate is connected to the water outlet header through a bend pipe, the water inlet header and the water outlet header are respectively located on the left and right sides of the frame, the plates are mounted in the frame, the connection parts are on the left and right sides of the frame, the plates are arranged parallel to each other and the intervals between two adjacent plates are uniform, and the arrangement direction of the plates is perpendicular to the flow direction of the hot fluid. The single-plate detachable plate heat exchanger disclosed in the present application can reduce the difficulty of maintenance and improve the maintenance efficiency through the external water header and the plates installed in the frame and the connection parts are on the left and right sides of the frame, and also ensure the smoothness of the movement of the plates on their disassembly and installation lines and the accuracy of the disassembly and installation lines of the plates through the reversing mechanism and the slide rail mechanism.

Description

Technical Field

[0001] The invention relates to the field of heat exchangers, and in particular to a plate heat exchanger with a detachable single plate. Background Art

[0002] Heat exchangers are devices that transfer part of the heat of hot fluid to cold fluid, also known as heat exchangers. Heat exchangers play an important role in chemical, petroleum, power, food and many other industrial production. In chemical production, heat exchangers can be used as heaters, coolers, condensers, evaporators and reboilers.

[0003] A heat exchanger is an energy-saving device that transfers heat between two or more fluids at different temperatures. In its application in the power industry, a heat exchanger transfers heat from a fluid with a higher temperature to a fluid with a lower temperature, so that the fluid temperature reaches the specified index of the process, thereby meeting the needs of process conditions and improving energy utilization.

[0004] In the process of thermal power generation, power plants use the heat energy generated by the combustion of combustibles and convert it into electrical energy through power generation devices, that is, fuel chemical energy → steam thermal energy → mechanical energy → electrical energy. In the process of combustible combustion turning water into high-temperature, high-pressure steam, part of the chemical energy of the fuel is converted into steam thermal energy, and the other part of the chemical energy of the fuel is not absorbed by water and is converted into hot fluid.

[0005] If the hot fluid is discharged directly, not only will the temperature of the fluid be too high to meet the discharge standard, but also the energy loss generated in the process of converting the chemical energy of the fuel into steam thermal energy will be large. Therefore, using a heat exchanger to transfer part of the heat of the hot fluid to the cold fluid can not only make the fluid temperature reach the specified index of the process, but also improve the energy utilization rate.

[0006] Since the power plant generates a large amount of energy, the heat exchanger used is also relatively large.

[0007] The heat exchanger is equipped with plates containing cold fluid. To save space, the plates need to be placed in parallel. In order to better absorb the heat in the hot fluid, the plates are thin-sheet structures, and all parallel plates are fixed by penetrating beams. The intervals between the plates are small. If the plates are damaged, all the plates need to be removed first. After replacing the damaged plates, all the plates need to be installed again, which makes it difficult to repair the plates.

[0008] Therefore, it is necessary to provide a heat exchanger that can install and remove plates in a single piece. Summary of the invention

[0009] The purpose of the present invention is to construct a single-plate detachable plate heat exchanger in which the plates are fixed in a single piece and can be removed and installed in a single piece based on the existing heat exchanger and based on the demand for detachable and replaceable plates in a single piece.

[0010] A single-plate detachable plate heat exchanger comprises a frame, a water header and a heat exchange plate are arranged on the frame, the water header consists of an inlet water header and an outlet water header, the inlet water header is provided with a water inlet, the outlet water header is provided with a water outlet, the heat exchange plate consists of a plurality of plates fixedly mounted on the frame, the plate consists of two layers of metal plates welded at the edges, welding points are regularly arranged inside, after inflation, the non-welded points inside the plate bulge outward, the bulge forms a flow channel between the two layers of metal plates, each of the plates is provided with a water inlet and a water outlet connected to the flow channel, the water inlet of the plate is connected to the inlet water header through a bend, the water outlet of the plate is connected to the outlet water header through a bend, and the characteristic is that based on the flow direction of the hot fluid, the flow direction is from left to right, the inlet water header and the outlet water header are respectively located on the left and right sides of the frame,

[0011] The plate is detachably mounted in the frame via a connecting piece, and the connecting parts are on the left and right sides of the frame.

[0012] The plates are arranged parallel to each other and the intervals between two adjacent plates are uniform. The arrangement direction of the plates is perpendicular to the flow direction of the thermal fluid.

[0013] The front-to-back direction of the frame needs to be connected to the frame of another heat exchanger, the left-to-right direction of the frame needs to be connected to the plate, and the bottom of the frame needs to be connected to the operating plane, so the plate can only be removed or installed individually above the frame.

[0014] In order to arrange the plate-like workpieces on the frame evenly, a grid plate is usually used to separate the plate-like workpieces.

[0015] The existing plate manufacturing technology is: first weld two metal plates together along the outer edge of the metal plate, reserve the inlet and outlet of the cold fluid, then set the flow line of the cold fluid on the welded metal plates according to the preset welding points, and finally inflate the space between the two metal plates, so that the metal plates swell up and the plate is formed. There are several welding points on the plate. When the plate is inflated, the metal plate without welding points swells up, and the edge of the plate will be deformed due to deformation stress.

[0016] The processing technology of the plate cannot make the edge of the plate reach the ideal flat state, that is, the edge of the plate is irregular and has a certain curvature. In order to adapt to the curvature of the edge of the plate, the tooth size of the grid plate needs to be set larger. The size of the tooth size must not only allow the plate to pass through, but also need to be able to accommodate the curvature margin of the edge of the plate. If the tooth size of the grid plate is small, the plate is easy to get stuck during removal and installation. If the tooth size of the grid plate is large, its limiting effect on the plate is relatively poor.

[0017] Furthermore, the frame is provided with several groups of partition devices corresponding to each plate, which can limit the moving path of the plate when removing and installing, and each group of the partition devices is provided with two, which are respectively located on the left and right sides of the plate.

[0018] Specifically, the separation device includes a pin shaft, a first reversing shaft, a second reversing shaft, and a slide slot seat, the pin shaft is fixedly mounted on the frame, the first reversing shaft is rotatably mounted on the pin shaft, the second reversing shaft is rotatably mounted on the first reversing shaft, the slide slot seat is fixedly mounted on the second reversing shaft, a first return spring is connected between the first reversing shaft and the pin shaft, and a second return spring is connected between the second reversing shaft and the first reversing shaft;

[0019] The first reversing shaft and the second reversing shaft rotate in opposite directions;

[0020] A first limit group for limiting the rotation angle of the first reversing shaft is provided between the first reversing shaft and the pin shaft;

[0021] A second limit group for limiting the rotation angle of the second reversing shaft is provided between the second reversing shaft and the pin shaft;

[0022] The slide seat is provided with a guide groove penetrating up and down, the guide groove is provided with an opening facing the plate, the slide seat is provided with two groups of slide grooves symmetrical about the front and rear positions of the guide groove, a plurality of slide grooves form a group, and the openings of the slide grooves are connected to the guide groove;

[0023] The partition device further includes a ball, a base, a third return spring, and a limiter, wherein the limiter is fixedly mounted on one end of the slide groove close to the guide groove, and an end surface of the limiter close to the guide groove is flush with the groove wall of the guide groove;

[0024] The base is slidably connected to the slide groove, one end of the base away from the guide groove is connected to one end of the third return spring, the other end of the third return spring is fixedly connected to the bottom of the slide groove, and one end of the base close to the guide groove is provided with a bowl-shaped groove whose shape and size correspond to the outer wall of the ball;

[0025] A circular hole is provided on the limiting member, and the shape and size of the hole wall of the circular hole correspond to the outer wall of the ball;

[0026] The ball rotates between the circular hole and the bowl-shaped groove, and a point on the ball is always in contact with the plate.

[0027] When the plate moves, the irregular curvature of its edge will contact the ball. As the plate moves, the ball will also change position. The ball can reduce the friction between the plate and the guide groove, ensuring that the ball can adapt to the irregular curvature of the plate edge and rotate flexibly.

[0028] The slide slot seat is installed on the pin shaft through the first reversing shaft and the second reversing shaft. The first reversing shaft and the second reversing shaft both rotate with the pin shaft as the rotation center, and the rotation directions are opposite, so that the slide slot seat is always opposite to the opening directions of the guide slot when not subject to external force, so that the slide slot seat rotates when the irregular edge of the plate squeezes it, the opening size of the guide slot can only accommodate the plate to pass through, and the plate will not get stuck due to the irregular bending of its edge when moving.

[0029] Further, the first limiting group includes a first limiting member and a first limiting groove, the first limiting groove is arranged on the pin shaft, the first limiting member is arranged on the first reversing shaft, and one end of the first limiting member slides in the first limiting groove as the first reversing shaft rotates.

[0030] Furthermore, the second limiting group includes a second limiting member and a second limiting groove, the second limiting groove is arranged on the pin shaft, the second limiting member is arranged on the second reversing shaft, and one end of the second limiting member slides in the second limiting groove as the second reversing shaft rotates.

[0031] Furthermore, the circular hole includes a large circular end and a small circular end, the end of the circular hole close to the guide groove is the small circular end, the end of the circular hole away from the guide groove is the large circular end, the radius of the small circular end of the circular hole is smaller than the radius of the large circular end of the circular hole, the radius of the small circular end of the circular hole is smaller than the radius of the ball, and the radius of the large circular end of the circular hole is not less than the radius of the ball.

[0032] Furthermore, a top hanger is fixedly installed on the upper part of the plate, the length of the top hanger is greater than the distance between the left and right inner walls of the frame, the length of the top hanger is less than or equal to the distance between the left and right outer walls of the frame, and the top hanger is fixedly connected to the frame, and the connection parts are on the left and right sides of the frame.

[0033] Further, the plate includes a plate A and a plate B, the plate A and the plate B are alternately arranged, the plate A and the plate B are fixedly connected to the frame by bolts arranged at the left and right edges thereof, the positions of the water inlets arranged on the plate A and the plate B are staggered left and right, and the positions of the water outlets arranged on the plate A and the plate B are also staggered left and right. The alternating arrangement of the plate A and the plate B makes the arrangement of the plates compact, and the water inlets and the water outlets are staggered left and right, which increases the contact area of ​​the cold fluid and improves the heat exchange performance of the heat exchanger in the case of the same installation space.

[0034] Furthermore, a header support plate is fixedly mounted on the frame, and the header support plate is provided with two left and right groups respectively located on the left and right sides of the frame, and the water header is fixedly mounted on the header support plate.

[0035] The beneficial effects of the present invention are as follows: a single-plate detachable plate heat exchanger disclosed in the present application can realize single-plate removal or installation through a water collecting tank arranged on the outside of a frame, and plates installed in the frame with connection parts on the left and right sides of the frame, thereby greatly reducing the difficulty of repairing the heat exchanger and improving the repair efficiency of the heat exchanger. Moreover, through a reversing mechanism and a slide rail mechanism, not only can the smoothness of the movement of the plate in the vertical direction be improved, but also the slide groove seat can be moved and swung along with the irregular bending of the edge of the plate, thereby greatly reducing the possibility of the plate being stuck when moving in a guide groove of smaller size, thereby ensuring the smoothness of the movement of the plate on its removal and installation line and the accuracy of the removal and installation line of the plate.

[0036] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following specifically cites a preferred embodiment and describes it in detail with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0038] Figure 1 It is a schematic diagram of the overall structure of a specific example of the heat exchanger of the present invention;

[0039] Figure 2 yes Figure 1 A magnified view of the local structure;

[0040] Figure 3 yes Figure 1 Schematic diagram of the cross-sectional structure at AA in the middle;

[0041] Figure 4 yes Figure 3 A magnified view of the local structure;

[0042] Figure 5 yes Figure 1 Schematic diagram of the cross-sectional structure at BB in the middle;

[0043] Figure 6 yes Figure 1 Schematic diagram of the cross-section structure at CC in the middle;

[0044] Figure 7 yes Figure 2 Schematic diagram of the cross-sectional structure at DD in the middle;

[0045] Figure 8 yes Figure 7 A magnified view of the local structure;

[0046] Fig. 9 yes Figure 8 A magnified view of the local structure;

[0047] Fig.10 yes Figure 8 Schematic diagram of the cross-sectional structure at EE in the middle;

[0048] Fig.11 yes Fig.10 A top view of

[0049] Fig.12 yes Fig.10 Bottom view of

[0050] Fig.13 1 is a schematic diagram of the structure of a plate B in a specific example of a heat exchanger of the present invention;

[0051] Fig.14 is a schematic diagram of the structure of a plate A in a specific example of a heat exchanger of the present invention;

[0052] Fig.15 1 is a schematic diagram of the structure of a top hanging member B in a specific example of a heat exchanger of the present invention;

[0053] Fig.16 is a schematic structural diagram of a top hanging member A in a specific example of a heat exchanger of the present invention;

[0054] Fig.17 1 is a schematic diagram of the structure of a top hanging member C in a specific example of a heat exchanger of the present invention;

[0055] Fig.18 is a schematic structural diagram of a sealing member in a specific example of a heat exchanger of the present invention;

[0056] In the figure: 101, frame; 102, heat exchange plate; 103, seal; 104, top hanger B; 105, top hanger C; 106, top hanger A; 109, plate A; 110, plate B; 114, elbow A; 115, header support plate; 116, water inlet; 117, water header; 118, elbow B; 120, partition device; 121, mounting seat; 122, second reversing shaft; 123, guide groove; 124, slide groove; 125, guide rail; 126, guide slider; 127, ball; 128, third return spring; 129, base; 130, limiter; 131, first return spring; 132, pin shaft; 133, second return spring; 135. First limiting member; 136. Second limiting member; 137. Second limiting groove; 138. First limiting groove; 139. Sliding groove seat; 140. Water outlet; 141. Bolt; 142. First reversing shaft. DETAILED DESCRIPTION

[0057] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0058] The plate heat exchanger with a detachable single plate of the present invention is further described in conjunction with the accompanying drawings.

[0059] like Figure 1 , Figure 2 , Figure 3 , Fig.13 and Fig.14 As shown, the heat exchanger described in this embodiment includes a frame 101. The frame 101 is a six-sided structure, namely the top, bottom, front, back, left and right sides. A group of header support plates 115 are fixedly installed on the left and right sides of the frame 101. The two groups of header support plates 115 are symmetrically positioned on the left and right. A water header 117 is fixedly installed on each group of header support plates 115. The water header 117 is located on the outside of the frame 101. The water header 117 consists of an inlet water header and an outlet water header. The inlet water header is located on the left, and the outlet water header is located on the right. The inlet water header is provided with a water inlet, and the outlet water header is provided with a water outlet.

[0060] A heat exchange plate 102 is arranged in the frame 101. The heat exchange plate 102 is composed of 12 plates fixedly installed on the frame 101. The plate is composed of two layers of metal plates welded at the edges. There are regularly arranged welding points inside. After inflation, the non-welding point part inside the plate bulges outward, and the bulge forms a flow channel between the two layers of metal plates. Each plate is provided with a water inlet 116 and a water outlet 140 connected to the flow channel. The water inlet 116 is located on the left side of the plate, and the water outlet 140 is located on the right side of the plate. The water inlet 116 of the plate is connected to the water inlet water header through a bend pipe, and the water outlet 140 of the plate is connected to the water outlet water header through a bend pipe.

[0061] The plates are arranged parallel to each other and the intervals between two adjacent plates are uniform.

[0062] The frame 101 includes 7 groups of cross beams arranged on the left and right surfaces thereof, and each group of cross beams is provided with two cross beams and the left and right positions are symmetrical.

[0063] like Figure 5 As shown, bolts 141 are connected to the left and right edges of the plate, and each plate is connected to 7 groups of bolts 141. Each group of bolts 141 is provided with two and the positions are symmetrical on the left and right. The 7 groups of bolts 141 from top to bottom correspond to the positions of the 7 groups of beams from top to bottom.

[0064] like Figure 7 As shown, 7×12 groups of partition devices 120 are provided on the crossbeam of the frame 101, and each group of partition devices 120 is provided with two and the left and right positions are symmetrical, wherein "7" means that 7 groups of partition devices 120 are provided in the vertical direction, and the 7 groups of partition devices 120 from top to bottom correspond to the positions of the 7 groups of crossbeams from top to bottom, respectively, and "12" means that 12 groups of partition devices 120 are provided in the horizontal direction, and the 12 groups of partition devices 120 from front to back correspond to the positions of 12 plates from front to back, respectively.

[0065] like Figure 2-Figure 6 , Figure 15-18 As shown, the plates include plate A109 and plate B110, and plate A109 and plate B110 are alternately arranged, and from front to back they are plate No. 1 B110, plate No. 1 A109, plate No. 2 B110, plate No. 2 A109, plate No. 3 B110, plate No. 3 A109, plate No. 4 B110, plate No. 4 A109, plate No. 5 B110, plate No. 5 A109, plate No. 6 B110, plate No. 6 A109.

[0066] The water inlets 116 on the plate A109 and the plate B110 are staggered left and right, and the water inlet 116 on the plate A109 is located on the left side of the water inlet 116 on the plate B110. The water outlets 140 on the plate A109 and the plate B110 are staggered left and right, and the water outlet 140 on the plate A109 is located on the left side of the water outlet 140 on the plate B110. The water inlet 116 on the left side and the water outlet 140 on the right side are connected to the water collecting tank 117 through the bend pipe A114, and the water inlet 116 on the right side and the water outlet 140 on the left side are connected to the water collecting tank 117 through the bend pipe B118.

[0067] The alternating arrangement of plates A109 and plates B110 and the left-right staggered arrangement of water inlets 116 and water outlets 140 can make the heat exchange plates 102 arranged compactly, increase the contact area of ​​the cold fluid in the same installation space, and improve the heat exchange performance of the heat exchanger.

[0068] Top hangers are fixedly installed on the upper parts of plates A109 and B110. Top hangers A106 are fixedly installed on the upper parts of plates A109 No. 1, A109 No. 2, A109 No. 3, A109 No. 4 and A109 No. 5, and top hangers A106 are connected to the rear end face of plate A109. Top hangers C105 are fixedly connected to the rear end face of plate A109 No. 6. Top hangers B104 are fixedly installed on the top of plate B110, and top hangers B104 are connected to the rear end face of plate B110.

[0069] In order to ensure the sealing of the top surface of the heat exchanger, a seal 103 is provided in front of the first plate A109.

[0070] The seal 103, the top hanger B104, the top hanger C105 and the top hanger A106 are all fixedly connected to the top beam of the frame 101. The seal 103, the top hanger B104, the top hanger C105 and the top hanger A106 are of the same length, and their length is greater than the distance between the left and right inner walls of the frame 101, and less than the distance between the left and right outer walls of the frame 101.

[0071] The sealing member 103, the top hanging member B104, the top hanging member C105 and the top hanging member A106 are all provided with grooves for avoiding the water inlet 116 and the water outlet 140 on the plate.

[0072] like Figure 7-Figure 12As shown, the partition device 120 is installed on the crossbeam of the frame 101 through a mounting seat 121, and a pin shaft 132 is fixedly installed on the mounting seat 121. The outer peripheral surface of the pin shaft 132 is rotatably connected to the first reversing shaft 142. A groove is provided in the first reversing shaft 142, and a first return spring 131 is provided in the groove. The first return spring 131 is connected between the pin shaft 132 and the first reversing shaft 142, and provides a force for the rotation of the first reversing shaft 142. The outer peripheral surface of the first reversing shaft 142 is rotatably connected to the second reversing shaft 122. A groove is provided in the second reversing shaft 122, and a second return spring 133 is provided in the groove. The second return spring 133 is connected between the first reversing shaft 142 and the second reversing shaft 122, and provides a force for the rotation of the second reversing shaft 122. A slide seat 139 is fixedly installed on the outer peripheral surface of the second reversing shaft 122.

[0073] Based on the projection from top to bottom, the first reversing shaft 142 rotates clockwise, and the second reversing shaft 122 rotates counterclockwise.

[0074] A first limiting member 135 is fixedly mounted on the upper portion of the first reversing shaft 142 , and an arc-shaped first limiting groove 138 is provided on the upper portion of the pin shaft 132 . One end of the first limiting member 135 slides in the first limiting groove 138 as the first reversing shaft 142 rotates.

[0075] A second limiting member 136 is fixedly mounted on the lower portion of the second reversing shaft 122 , and an arc-shaped second limiting groove 137 is provided on the lower portion of the pin shaft 132 . One end of the second limiting member 136 slides in the second limiting groove 137 as the second reversing shaft 122 rotates.

[0076] The slide seat 139 is provided with a guide groove 123 which runs through from top to bottom. The guide groove 123 is provided with an opening and the opening faces the plate. The slide seat 139 is also provided with two groups of slide grooves 124 which are symmetrical about the front and rear positions of the guide grooves 123. Three slide grooves 124 form a group, and the openings of the slide grooves 124 are connected to the guide grooves 123.

[0077] A limiting member 130 is fixedly installed at one end of the slide groove 124 close to the guide groove 123, and the end surface of the limiting member 130 close to the guide groove 123 is flush with the groove wall of the guide groove 123. A circular hole is provided on the limiting member 130, and a ball 127 is rotatably connected to the circular hole. The shape of the hole wall of the circular hole corresponds to the outer wall of the ball 127.

[0078] A guide rail 125 symmetrically positioned about the left and right sides of the slide groove 124 is provided in the slide groove seat 139. The guide rail 125 is communicated with the slide groove 124. A guide slider 126 is slidably connected in the guide rail 125. A base 129 is fixedly installed between the left and right guide sliders 126. The base 129 is located in the slide groove 124 and is rotatably connected to the ball 127. The ball 127 is located between the limit piece 130 and the base 129. A third return spring 128 is connected between the end surface of the base 129 away from the guide groove 123 and the bottom of the slide groove 124.

[0079] When it is necessary to remove the plates one by one,

[0080] Cut off the elbow A114 and the elbow B118 connected to the plate to be removed, remove the bolts connecting the left and right sides of the plate to the frame 101, and finally pull out the plate from the top.

[0081] When a single-piece mounting plate is required,

[0082] Insert the plate to be installed from the top to the designated position, then fix the left and right sides of the plate to the frame 101 with bolts, and finally connect the elbow A114 and the elbow B118 to the plate by welding technology.

[0083] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A single-plate detachable plate heat exchanger, comprising a frame, a water header and a heat exchange plate are arranged on the frame, the water header is composed of an inlet water header and an outlet water header, the inlet water header is provided with a water inlet, the outlet water header is provided with a water outlet, the heat exchange plate is composed of a plurality of plates fixedly mounted on the frame, the plate is composed of two layers of metal plates welded at the edges, and welding points are regularly arranged inside. After inflation, the non-welding point part of the plate bulges outward, and the bulge forms a flow channel between the two layers of metal plates, each of the plates is provided with a water inlet and a water outlet connected to the flow channel, the water inlet of the plate is connected to the inlet water header through a bend, and the water outlet of the plate is connected to the outlet water header through a bend, characterized in that Based on the flow direction of the hot fluid, which is from left to right, the water inlet header and the water outlet header are located on the left and right sides of the frame respectively. The plate is detachably mounted in the frame via a connecting piece, and the connecting parts are on the left and right sides of the frame. The plates are arranged parallel to each other, and the intervals between two adjacent plates are uniform, and the arrangement direction of the plates is perpendicular to the flow direction of the hot fluid; the frame is provided with a plurality of groups of partition devices corresponding to each plate, which can limit the moving path of the plates when they are removed and installed, and each group of the partition devices is provided with two, which are respectively located on the left and right sides of the plate; The separation device includes a pin shaft, a first reversing shaft, a second reversing shaft, and a slide slot seat, wherein the pin shaft is fixedly mounted on the frame, the first reversing shaft is rotatably mounted on the pin shaft, the second reversing shaft is rotatably mounted on the first reversing shaft, the slide slot seat is fixedly mounted on the second reversing shaft, a first return spring is connected between the first reversing shaft and the pin shaft, and a second return spring is connected between the second reversing shaft and the first reversing shaft; The first reversing shaft and the second reversing shaft rotate in opposite directions; A first limit group for limiting the rotation angle of the first reversing shaft is provided between the first reversing shaft and the pin shaft; A second limit group for limiting the rotation angle of the second reversing shaft is provided between the second reversing shaft and the pin shaft; The slide seat is provided with a guide groove penetrating up and down, the guide groove is provided with an opening facing the plate, the slide seat is provided with two groups of slide grooves symmetrical about the front and rear positions of the guide groove, a plurality of slide grooves form a group, and the openings of the slide grooves are connected to the guide groove; The partition device further includes a ball, a base, a third return spring, and a limiter, wherein the limiter is fixedly mounted on one end of the slide groove close to the guide groove, and an end surface of the limiter close to the guide groove is flush with the groove wall of the guide groove; The base is slidably connected to the slide groove, one end of the base away from the guide groove is connected to one end of the third return spring, the other end of the third return spring is fixedly connected to the bottom of the slide groove, and one end of the base close to the guide groove is provided with a bowl-shaped groove whose shape and size correspond to the outer wall of the ball; A circular hole is provided on the limiting member, and the shape and size of the hole wall of the circular hole correspond to the outer wall of the ball; The ball rotates between the circular hole and the bowl-shaped groove, and a point on the ball is always in contact with the plate.

2. A plate heat exchanger with a detachable single plate according to claim 1, characterized in that: The first limiting group includes a first limiting member and a first limiting groove, the first limiting groove is arranged on the pin shaft, the first limiting member is arranged on the first reversing shaft, and one end of the first limiting member slides in the first limiting groove as the first reversing shaft rotates.

3. The plate heat exchanger with a detachable single plate according to claim 1, characterized in that: The second limiting group includes a second limiting member and a second limiting groove, the second limiting groove is arranged on the pin shaft, the second limiting member is arranged on the second reversing shaft, and one end of the second limiting member slides in the second limiting groove as the second reversing shaft rotates.

4. The plate heat exchanger with a detachable single plate according to claim 1, characterized in that: The circular hole includes a large circular end and a small circular end. The end of the circular hole close to the guide groove is the small circular end, and the end of the circular hole away from the guide groove is the large circular end. The radius of the small circular end of the circular hole is smaller than the radius of the large circular end of the circular hole, the radius of the small circular end of the circular hole is smaller than the radius of the ball, and the radius of the large circular end of the circular hole is not less than the radius of the ball.

5. The plate heat exchanger with a detachable single plate according to claim 1, characterized in that: A top hanger is fixedly installed on the upper part of the plate, the length of the top hanger is greater than the distance between the left and right inner walls of the frame, the length of the top hanger is less than or equal to the distance between the left and right outer walls of the frame, and the top hanger is fixedly connected to the frame, and the connection parts are on the left and right sides of the frame.

6. The plate heat exchanger with a detachable single plate according to claim 1, characterized in that: The plate includes plate A and plate B, and the plate A and the plate B are alternately arranged. The plate A and the plate B are fixedly connected to the frame by bolts arranged on the left and right edges thereof. The positions of the water inlets arranged on the plate A and the plate B are staggered left and right, and the positions of the water outlets arranged on the plate A and the plate B are also staggered left and right.

7. The plate heat exchanger with a detachable single plate according to claim 1, characterized in that: A header support plate is fixedly mounted on the frame, and the header support plate is provided with two left and right groups respectively located at the left and right sides of the frame, and the water header is fixedly mounted on the header support plate.

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